So for this test I simply tried to see how many layers of pastel the board could hold, and what it was like to blend the colors. I also tried different ways of removing the pastels.
I started off by laying down some Dick Blick and Rembrandt pastels. I only used three layers because I could not put anymore color on top. At that point, I was simply pushing the color around on the board, even with buttery soft pastels. Then I took my eraser and with the tip of it, I drew a heart in the middle of the pastel. Easy to do since there is really nothing to hold the pastels onto the board.
Next I used Art Spectrum pastels. These are harder pastels and they did not blend together at all! Here are three layers of colors just trying to blend with the pastel itself. Obviously not working.
Then I tied to blend with my finger, it was a little bit better, but not much.
I then put down some more Dick Blick and Rembrandt pastels and tried to blend with my finger. You can see the big empty space in the middle where I just pushed the pastel off the board.
So, bacsically, pastels, whether soft or hard, should not be used on the Richeson Toned Gessoed Hardboard. I realize these boards were not made with pencils and pastels in mind, but I always like to try out new surfaces with everything because you never know when you'll find a real pearl in an unexpected place. Like when I started using colored pencils on pastelbord. Now that turned out to be a fantastic winner!
I keep using the same board over and over for these tests, so I had to remove the pastel to prepare for the next test. I didn't want to mess up my erasers by removing pastel, so I decided to try to wash the pastel off under the faucet. Yes, I literally ran the board under water and rubbed the surface with my fingers trying to get the color off. As you can see, the Art Spectrum really stained the surface, but it did come off after I dried the board and used the eraser. The Dick Blick and Rembrandt pastels washed off pretty well, then I used the eraser to finish them off. If you click on the photo below you will be able to see clearly where I started erasing the pastels off the board.
So, two mediums down, three more to go.